I am working for an oil company and the proyect I have is to select the material for a multi phase fluid (oil+water+gas). On the present conditions we have 15000 ppm Hydrogen Sulphide (H2S). And the preassure proposed for the pipe is 17 bar.
The selected material is Epoxy Reinforced Fiber, but some people has concerns about Hydrogen Sulfide diffusion permeation to the enviroment.
Do you have the permeation coeficient (the fluid temperature is about 50 degrees Celcious)?
Have you some advice to give me on the topic?
follow up posts
On June 30, 2008 at 10:26:28 Composite Analytica posts:
A ball park figure for H2S permeation at 50 degrees Celsius, permeating in epoxy reinforced fibre is:
6 E -14 to 3 E-13 [m3 H2S / m3 Epoxy x bar] [m2/s].
This figure is a ball park for steady state permeation and for pure H2S (no other chemicals present in the wall, like benzene, water etc.)
Considering the circumstances, at the concentration and pressure given, it may depend on the wall thickness and wall surface, whether Hydrogen Sulfide diffusion and permeation is a problem. In my opinion this H2S diffusion case is certainly worthwhile looking at, in more detail.
Regards,
[responses: 1]
On June 29, 2008 at 11:53:16 Jian Sun posts:
To whom will concern it:
I am looking for diffusion coefficient values for Helium and water vapor in unfilled and fibre filled epoxy resin at room temp (25c). Also I notice that the unit for permeability in volume is m2/s, how shall I calculate the total volume per second with given thickness and area of epoxy resin?
sincerely,
Jian Sun
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